Thought this would be of interest....
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From: k6ll@JUNO.COM (David O. Hachadorian)
On Wed, 21 Aug 1996 20:42:43 -0500 ve6sv@oanet.com (Gordon R. Kosmenko)
writes:
>General technical inquiry......has anybody interfaced CT9 to a
>TS-950SDX ?
>I am interested in the hardware connections. Wiring up the ACC1 jack
>directly to the computer's COM port. Without using the IF-232C option.
>
>Are the RS-232C voltages from the computer COM a risk to the rig ?
>
>I am very much like to "talk" with the folks you have done some work
>in this area.
>
>Thanks & 73 ....Gord
>************************************************************
>* Gordon R. Kosmenko Internet Email ve6sv@oanet.com *
>
>
Gord,
I have hooked a serial port (RS-232) directly to my
TS-850 (TTL), and use it with TRLog. You have to protect
the TTL radio from the higher RS-232 voltage. That's the
purpose of the zener diode clipper. I'm pretty sure the
TS-950 pinouts are the same as the 850. Here's the hookup.
I have trouble drawing pictures with my e-mail editor.
DB-25 TS-850 ACC 1
----- ------------
pin 3 (RxD)--------------------- pin 2 (TxD)
pin 2 (TxD)----/\/\/\----------- pin 3 (RxD)
470 ohms |
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-----
/\
/ \ 5 volt zener
----
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pin 7 (Gnd)--------------------- pin 1 (Gnd)
------ pin 4 (CTS)
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------ pin 5 (RTS)
Check it carefully before plugging it in! It has worked for
me for about the past two years with no problems.
Dave, K6LL (on vacation in Utah)
k6ll@juno.com
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